Depression
Feeling sad, unhappy, wretched, or down in the dumps can all be symptoms of depression. It's commonly associated with a mood condition in which feelings of grief, loss, anger, or frustration disrupt daily living for weeks or more. Irritation, restlessness, thoughts of hopelessness, sleeping difficulties, and other symptoms are common.
Schizophrenia
Schizophrenia is a mental illness in which it is difficult to distinguish between what is real and what is not. It makes it harder for a person to think clearly as well.
Tourette's Syndrome
Tourette syndrome is a neurological disorder that causes people to make uncontrollable, repetitive movements or sounds. Tics are the movements or sounds that these people make. Although ourette's disease is no longer considered a rare ailment, it is not always appropriately diagnosed because most cases are minor, and the intensity of tics for most children lessens as they enter puberty.